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An improved system for the control of dissolved ...

Description

Citation

An improved system for the control of dissolved oxygen in freshwater aquaria

Author(s)

M. J. Landman, Michael R. van den Heuvel

Journal

Water Research

Date

2003

Volume

37

Issue

18

Start page

4337

End page

4342

Abstract

A system for the removal and control of dissolved oxygen (DO) from freshwater was designed and constructed with aquarium-type fish studies in mind. Degassed water was obtained using a partial vacuum of -14 psi, and DO regulated at an aquarium scale using electronically controlled aeration with timed partial water renewal. The degassing system was capable of producing water with approximately 1.7 mg L(-1) DO within 10 min of operation, and 0.55 mg L(-1) after 2h. The control system was capable of maintaining DO levels of ca 0.8 mg L(-1) over 48 h in the absence of aeration and further capable of precisely controlling DO levels as low as 1.16+/-0.002 mg L(-1) (mean+/-SEM) with aeration over a 48 h period.